Sight-light for firearms.



c. A. LEWIS. SIGHT LIGHT FOR FIREARMS.

-APPLICATION FILED DEC.2| 1914.

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SIGHT-LIGHT FOR FIRERMS.

' Specication of Letters Patent.

Patented Feb. c, rara.

Application filed December 2, 1914. Serial No. 875,072.

To all whom 'it may concern:

Be it known that I, CLnFoRD A. LEWIS,

a citizen of thenited States, residing in the city of Portland, countyof Multnomah, and State of Oregon, have invented certain new and usefulImprovements in Sight- Lights for Firearms, of which the following 1s aspecication.

My invention relates to improvements in slght lights for firearms of thecharacter referred to in United States Letters Patent Nos. 982,280,1,045,800, and 1,07 0,348, heretofore issued to me, and by means ofwhich improvements I am able to get better and more accurate results.Among the salient obJects of my present invention are,to provlde a sightlight of special construction whereby greater efficiency is secured, and1n doing this I use two lenses with a special lamp, particularlydesigned for this purpose; to provide in connection with a device ofthis character means for causing a center spot 1n the light as thrownupon the object aimed at, thus making possible a more accurate aim.Other objects and advantages will be apparent from the followingdescrip- -tion of the invention, taken with the accompanying sheet ofdrawings, in which,-

.Flgure'l is a side elevation of a pistol wlth my invention appliedthereto;

Fig. 2 is a side elevation of the invention apart from a gun, with apart broken' out 3f the side to show the interior construcion;

Fig., is an end view of the lamp used 1n my sight light and shows a spotin the center thereof;

Flg. 4 is a detail view of means for securing the device to a pistol, asshown in F1g. 1, or a gun, shown in Fig. 6;

Fig. 5 is a side elevation of a new U. S. automatic, with my inventionapplied thereto;

Fig. 6 is a side elevation of a shot gun with my invention appliedthereto; and

Fig. 7 shows the light effect on an object aimed at with the center spotcaused by the spot on the end of the lamp.

Referring now to the drawings more in detail, and particularly to Figs.2 and 3, the lamp A, is a special tungsten miniature lamp, made tipless.Instead of burning in vacuum, the interior of the lamp is filled withnitrogen. This. gives a brilliant white light, with double the candlepower, and

with less voltage, and at the same time gives longer range of light. Iam also able to decrease the size of my batteries and thereby enabled tomake the handles of pistols more nearly normal in size.

I have also discovered that in order to successfully produce a spot inthe light effect thrown on the object aimed at, it is necessary to placethe spot on the lamp itself instead of on the lens. I have found that byplacing a small dot of drawing ink, about the size of a pin head, of anydesired color, but preferably black, red or green, upon the center ofthe end of the lamp, as indicated at A', Figs. 2 and 3, there will bethrown a large dot in the center of the light which strikes the objectaimed at, which, at to 75 feet, is about the size of a silver dollar.

In the embodiment of my invention as here shown, I prefer to use astraight cylindrical tube 1, in which to mount my lamp and lenses 2 and3, as indicated in Fig. 2. I place a plus lens of twenty diopters powertwo inches from the light, as indicated at 2, and then place a lens of1.25 diopters minus power, designated 3, seven-eighths of an inch infront of the plus lens. The use of the minus lens is to correct theaberration, and to regulate the size of the light area. The distance ofthe light from the lens, and the length of the tube may be varied atwill by changing the strength of the lenses and varying the distance thelenses are separated.

In order to meet the various conditions arising from the irregularitiesin the lamps, I- place my lenses in mountings in such man. ner that theycan be adjusted in either direction, thus enabling me to regulate thedistance they are from the lamp, or the distance between the lamps. byusing telescoping inner tubes, as 4 4, for carrying the lenses, asindicated 1n dotted lines, in Fig. 2. These are slidably mounted in themain tube 1.

The device can be readily attached to and used with any gun. 0

In Fig. 1 I have shown it in use wlth a pistol, secured thereto by meansof sprmg ring clamping members, 5 5, as clearly illustrated in Fig. 4.The circuit connections arev shown in dotted lines, running back to thebattery in the handle, also indicated in dotted lines, withcircuit-breaking This I accomplish members 6 6, adapted to be movedtogether automatically by a pin 7, when the hammer 8 is pulled back, asclearly illustrated in dotted lines, Fig. l. Pin 7 may be locked down bya cross pin 7, as indicated, if desired.

In Fig. 5 I have shown my invention applied to one of the new U. S.automatic revolvers, as indicated, With the battery mounted in the sideof the handle, as indicated by the dotted lines, and With the circuitconnections running from the lamp A thereto, with a switch contactmember 9, positioned to be moved with the thumb at Will to complete thecircuit.

In Fig. 6 the light is shown in-use With a shot gun, With a battery setin the body, as indicated in dotted lines, and With a switch button ofany simple and desired form sety at l0, in the side of the handle.

In Fig. 7 I have illustrated the light effect as thrown by my device onthe object aimed at, with the center dark or colored spot indicated inblack.

I am aware that slight changes can be made in the embodiment of myimprovements here shown for illustrative purposes, and I do not,therefore, limit the invention to these details, except as I maybelimited by the hereto appended claim.

I claiIn,-

In a device of the character described, a tubular member, a lamp mountedtherein and provided in the center of its end With a dark spot and tWocoperating lenses adjustably mounted therein and adjustable withrelation to'each other and to said lamp, substantially as indicated.

Signed at Portland, Multnomah county, Oregon, this th day of November,1914.

CLIFFORD A. LEWIS.

In presence of* J. E. CROMAN, R. B. FRENCH.

